in order to have power valve enrichment at idle you would have to be idling off of the main system -as in.. the primary throttle blades are too far open. Then theres the torn PV idea, too high float idea and torn and in the mains. However you wanna stack it.
The Op needs to see if the secondary throttle blades are adjusted open too much.
You need to take the carburetor off and on the bottom side there's a small little flat head screw to adjust the stationary position of the secondary throttle blade.
At a glance of this thread I believe that's his problem and why he can close the primary all the way and it still idles. Vacuum secondary and double pumper have this feature ..or at least the ones I've seen. Now there is also or was some debate about fixed idle circuit on old holley vac sec carbs. About 15 yrs ago we argued over it .lol
